1 //格式化金额 使其保留2位小数
2 function formateAmount(val) {
3 /*
4 * 参数说明：
5 * number：要格式化的数字
6 * decimals：保留几位小数
7 * dec_point：小数点符号
8 * thousands_sep：千分位符号
9 * */
10 var number = val;
11 var decimals = 2;
12 var dec_point = ".";
13 var thousands_sep = ",";
14 number = (number + '').replace(/[^0-9+-Ee.]/g, '');
15 var n = !isFinite(+number) ? 0 : +number,
16 prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
17 sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
18 dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
19 s = '',
20 toFixedFix = function (n, prec) {
21 var k = Math.pow(10, prec);
22 return '' + Math.round(n * k) / k;
23 };
24
25 s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
26 var re = /(-?\d+)(\d{3})/;
27 while (re.test(s[0])) {
28 s[0] = s[0].replace(re, "$1" + sep + "$2");
29 }
30
31 if ((s[1] || '').length < prec) {
32 s[1] = s[1] || '';
33 s[1] += new Array(prec - s[1].length + 1).join('0');
34 }
35 return s.join(dec);
36 }
